---
title: firstTrackNumberInLastSessionLSB
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 13.0+, macOS 10.1+]
path: iokit/cddiscinfo/1584212-firsttracknumberinlastsessionlsb
---

# firstTrackNumberInLastSessionLSB

## Declaration

```occ
UInt8 firstTrackNumberInLastSessionLSB;
```